Match each function with its rate of growth or decay pls help as soon as you can, I'll give brainliest to the first person that answers correctly.

James is playing his favorite game at the arcade. after playing the game 3 times, he has 8 tokens remaining. he initially had 20 tokens, and the game costs the same number of tokens each time. the number tt of tokens james has is a function of gg, the number of games he plays